body {
  margin: 0 auto;
  width: 100%;
  min-width: 320px;
  max-width: 640px;
  font-size: 14px;
  color: #666;
  font-family: -apple-system, 'Helvetica Neue', sans-serif;
}
.app {
  height: 45px;
}
.app ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.app ul li {
  float: left;
  background: #333;
  height: 45px;
  line-height: 45px;
  text-align: center;
  color: #fff;
}
.app ul li:nth-child(1) {
  width: 8%;
}
.app ul li:nth-child(1) img {
  width: 10px;
}
.app ul li:nth-child(2) {
  width: 10%;
}
.app ul li:nth-child(2) img {
  width: 30px;
  vertical-align: middle;
}
.app ul li:nth-child(3) {
  width: 57%;
}
.app ul li:nth-child(4) {
  width: 25%;
  background-color: #F63515;
}
.search-wrap {
  height: 44px;
  position: fixed;
  width: 100%;
  min-width: 320px;
  max-width: 640px;
  line-height: 44px;
  text-align: center;
  overflow: hidden;
}
.search-wrap .wrap-left {
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 100%;
}
.search-wrap .wrap-left::before {
  content: '';
  display: block;
  margin: 14px 0 0 15px;
  width: 20px;
  height: 18px;
  background: url(../assets/images/s-btn.png) no-repeat;
  background-size: 20px 18px;
}
.search-wrap .search {
  height: 30px;
  margin: 0 50px;
  margin-top: 7px;
  background-color: #fff;
  border-radius: 20px;
}
.search-wrap .search::before {
  display: block;
  position: absolute;
  margin-top: 7px;
  margin-left: 13px;
  width: 20px;
  height: 15px;
  content: '';
  background: url(../assets/images/jd-sprites.png) no-repeat;
  background-size: 200px;
}
.search-wrap .search::after {
  display: block;
  position: absolute;
  margin-top: 5px;
  margin-left: 40px;
  width: 1px;
  height: 20px;
  content: '';
  background-color: #ccc;
}
.search-wrap .search .search-icon {
  display: block;
  position: absolute;
  margin-top: 7px;
  margin-left: 50px;
  width: 18px;
  height: 15px;
  background: url(../assets/images/jd-sprites.png) no-repeat;
  background-position: -83px 0px;
  background-size: 200px;
}
.search-wrap .wrap-right {
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 100%;
  color: #fff;
}
.main-content .slider img {
  width: 100%;
}
.main-content .brand {
  position: relative;
  margin-top: -15px;
  overflow: hidden;
  border-radius: 10px 10px 0 0 ;
  z-index: 9;
}
.main-content .brand div {
  float: left;
  width: 33.33%;
}
.main-content .brand img {
  width: 100%;
}
.menu {
  width: 100%;
}
.menu ul {
  padding: 0px;
  margin: 0px;
  list-style: none;
}
.menu ul li {
  float: left;
  width: 20%;
  text-align: center;
  vertical-align: middle;
}
.menu ul li a {
  text-decoration: none;
  color: #666;
}
.menu ul li a img {
  display: block;
  width: 40px;
  margin: 10px auto;
}
.menu ul li a span {
  display: block;
}
